Suzuki Outboard Propeller Calculator

Suzuki Outboard Propeller Calculator

Suzuki Outboard Propeller Calculator

Propeller Size (Diameter x Pitch)Recommended Applications
9.25″ x 9″Small boats, dinghies, and lightweight fishing boats with lower horsepower Suzuki outboards.
9.25″ x 10″Improved acceleration and mid-range performance for small to medium-sized boats.
9.25″ x 11″All-around performance for a range of boat types and conditions.
9.25″ x 12″Increased top speed for smaller boats with Suzuki outboards.
10.5″ x 11″Versatile propeller for medium-sized boats, suitable for various applications.
10.5″ x 12″Enhanced top speed and mid-range performance for medium-sized boats.
10.5″ x 13″Improved acceleration and load-carrying capability for medium-sized boats.
11″ x 13″Enhanced top speed and performance for larger boats with Suzuki outboards.
11″ x 14″Increased top speed and mid-range performance for larger boats.
11″ x 15″High-speed performance for larger, more powerful Suzuki outboard motors.
13″ x 19″Heavy-duty propeller for larger boats and Suzuki outboards with higher horsepower.


How do I know what size prop to get for my outboard?

The size of the propeller for your outboard is determined by the outboard motor’s horsepower and the boat’s size and type. You can consult your outboard motor’s manufacturer or refer to a propeller sizing guide for recommendations.

How do I choose the right propeller for my outboard?

Choosing the right propeller involves considering factors like boat type, desired performance (speed or torque), engine specifications, and the propeller’s material and design. Consult the manufacturer’s recommendations or seek advice from a marine expert for a proper fit.

What pitch of propeller do I need for my boat?

Propeller pitch depends on your boat’s size, weight, and desired performance. As a rough estimate, a pitch that’s 1 inch per 100 horsepower might work, but it’s essential to consult manufacturer guidelines or a propeller expert for a precise recommendation.

What pitch prop will make my boat faster?

To increase speed, you generally need a higher pitch propeller. However, it’s crucial to find the right balance, as too high a pitch can strain the engine and reduce acceleration.

Is a 3 or 4-blade prop better for a small boat?

A 3-blade propeller is often more efficient for smaller boats, as it offers a good balance of speed and maneuverability. However, a 4-blade prop can provide better stability and grip in rough water.

Will a bigger diameter prop make my boat faster?

Increasing propeller diameter can improve low-end torque and acceleration but may not necessarily make your boat faster at top speed. It’s a trade-off between acceleration and top speed.

What is the best prop for speed?

For pure speed, a high-pitched, 3-blade stainless steel propeller designed for your specific boat and engine combination would be ideal. However, performance varies depending on many factors, so consulting a professional is recommended.

Is a 3 blade prop better than 2 boat?

In most cases, a 3-blade propeller is better than a 2-blade propeller as it provides better balance between speed and stability.

Should I increase or decrease propeller pitch?

Increasing pitch can improve top speed but reduce low-end power. Decreasing pitch will do the opposite. Choose based on your boat’s specific needs.

How low should your prop be below boat?

The propeller should be submerged at least 2 inches below the boat’s hull when the boat is at rest, and ideally, it should be 1-2 inches below the hull while the boat is on plane.

Can I put a different pitch prop on my boat?

Yes, you can change the propeller pitch to optimize performance. Consult manufacturer guidelines or a propeller expert for the appropriate pitch for your specific needs.

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What is the most efficient propeller pitch?

The most efficient pitch depends on your boat’s characteristics and intended use. Typically, a pitch that allows the engine to reach its recommended wide-open throttle (WOT) RPM range is considered efficient.

What does Overpropped mean?

Being overpropped means using a propeller with too high pitch or diameter for your boat and engine. It can lead to reduced performance, increased strain on the engine, and poor fuel efficiency.

Does a shallow pitch propeller perform better?

Shallow pitch propellers are better for low-speed, high-torque applications. They provide good acceleration and maneuverability but sacrifice top speed.

What are the disadvantages of a 4-blade prop?

A 4-blade propeller can reduce top speed slightly compared to a 3-blade propeller, but it offers better stability, grip, and handling in rough water.

What is the most efficient propeller shape?

A high-quality, well-designed propeller with the right blade shape for your boat and engine is the most efficient.

Is a 4-blade prop worth it?

A 4-blade prop can be worth it if you prioritize stability and handling over a slight reduction in top speed. It’s especially beneficial in rough water conditions.

What happens if your propeller is too big?

An oversized propeller can overload the engine, leading to reduced RPM, overheating, and potential engine damage. It can also reduce overall boat performance.

Is stainless steel prop better than aluminum?

Stainless steel props are more durable and provide better performance than aluminum props. They can be a worthwhile investment for long-term use.

How can I make my small outboard faster?

To make a small outboard faster, consider upgrading to a higher horsepower engine, optimizing propeller size and pitch, reducing boat weight, and maintaining the engine in top condition.

Will a stainless steel prop increase hole shot?

Yes, a stainless steel propeller can improve hole shot (the ability to get on plane quickly) due to its increased durability and efficiency.

Are stainless steel props faster?

Stainless steel props can potentially provide a slight increase in speed compared to aluminum props, primarily due to their efficiency and durability.

How do I get more speed out of my prop?

To get more speed from your prop, consider increasing pitch, reducing boat weight, improving engine performance, and ensuring proper maintenance.

What is the best shape for a boat propeller?

The best propeller shape depends on your boat’s design and purpose. Consult with experts to find the most suitable propeller shape for your specific needs.

What is the best number of blades for a propeller?

The best number of blades depends on factors like boat type and intended use. 3-blade propellers are common for a good balance of performance, while 4-blade props offer increased stability.

How much faster is a 3 blade prop than a 4 blade?

The speed difference between a 3-blade and 4-blade propeller can vary, but generally, a 3-blade propeller might provide a slightly higher top speed due to reduced drag.

What happens if prop pitch is too low?

If the prop pitch is too low, your boat may have good acceleration but a low top speed. The engine may also reach higher RPM than recommended, potentially damaging it.

What should the pitch and rpm be on a boat propeller?

The pitch and RPM should match the manufacturer’s recommendations for your specific boat and engine. Consult your owner’s manual or the manufacturer for guidance.

Does a bigger prop mean more thrust?

A bigger propeller can provide more thrust, especially at lower speeds and when accelerating. However, it may not necessarily result in higher top speed.

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How far should my outboard be in the water?

The outboard should be submerged to the point where the anti-ventilation plate (located just above the propeller) is about 1-2 inches below the water surface when the boat is on plane.

How should my outboard sit on my boat?

Your outboard should be mounted so that it’s parallel to the boat’s transom, with the cavitation plate level with or slightly below the boat’s hull when the boat is on plane.

What are the symptoms of outboard mounted too low?

Symptoms of an outboard mounted too low include poor handling, excessive drag, ventilation (air being sucked into the propeller), and reduced top speed.

How do you tell if a boat is over propped?

Signs of an overpropped boat include difficulty reaching the engine’s recommended RPM range at wide-open throttle, slow acceleration, and decreased top speed.

What happens if you put the wrong prop on a boat?

Using the wrong propeller can result in poor performance, reduced speed, engine strain, and potential damage. It’s essential to choose the right prop for your boat and engine.

What does adding cup to a boat prop do?

Adding cup to a boat propeller increases its grip on the water, improving acceleration and reducing slip. It can enhance overall performance.

What is the best pitch for acceleration on a prop?

For better acceleration, a lower pitch propeller is generally preferred as it provides more low-end power.

How do you control prop pitch?

Prop pitch is typically a fixed characteristic of a propeller. To change pitch, you need to replace the propeller with one of the desired pitch.

Can you add pitch to a prop?

No, you cannot add pitch to an existing propeller. To change pitch, you need to purchase a propeller with the desired pitch.

What does feathering a propeller mean?

Feathering a propeller means adjusting its blades to reduce drag when the engine is not in use, typically by aligning them parallel to the water flow.

Is it bad to run an outboard engine at full throttle?

Running an outboard engine at full throttle within its recommended RPM range is not bad for the engine. However, prolonged operation at maximum RPM without proper maintenance can lead to wear and tear.

What RPM should I run my outboard?

You should run your outboard within the manufacturer’s recommended RPM range, usually specified in the owner’s manual.

How much RPM does a prop pitch change?

A propeller’s pitch directly affects the engine’s RPM. Higher pitch propellers reduce RPM, while lower pitch propellers increase RPM.

Is a 4 blade prop better than 3?

A 4-blade propeller can provide better grip and stability, especially in rough water, but it may sacrifice a slight amount of top speed compared to a 3-blade prop.

Will a lower pitch prop make my boat faster?

No, a lower pitch propeller will typically reduce your boat’s top speed but provide better low-end power and acceleration.

Does bigger diameter prop increase speed?

A bigger diameter propeller can enhance low-speed performance, such as acceleration and low-end torque, but it may not necessarily increase top speed.

Is a 4 blade prop better than 2?

A 4-blade propeller generally offers better performance and stability than a 2-blade prop, but the specific choice depends on your boat and intended use.

Why is a 2 blade prop faster than a 3 blade?

A 2-blade propeller can be faster than a 3-blade propeller in some situations due to reduced drag and weight. However, it may sacrifice some stability and grip.

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Is a 5 blade prop better than 4?

A 5-blade propeller is often used for specific applications like heavy boats or situations requiring maximum stability and grip, but it may not necessarily be better for all boats.

What is the choice of propeller?

The choice of propeller depends on your boat’s type, size, engine, and intended use. Consult manufacturer guidelines and experts for the best choice.

Why are constant speed propellers better?

Constant speed propellers (variable-pitch) are used in aircraft and not typically in boats. They allow for adjusting blade pitch in flight to maintain a constant RPM and optimize performance.

What decreases propeller efficiency?

Propeller efficiency can be reduced by factors like incorrect pitch, damaged blades, cavitation, and marine growth on the propeller.

Why are 4 blades better than 3?

Four-blade propellers are better than three-blade propellers for certain applications, providing improved grip, stability, and handling, especially in rough water.

What is the most efficient number of propellers?

The most efficient number of propellers depends on your boat’s design and intended use. There’s no one-size-fits-all answer; it varies from boat to boat.

What is the most efficient propeller blade angle?

The most efficient blade angle depends on your specific boat and engine. It’s determined by factors like pitch and design, and it’s typically optimized by the manufacturer.

Is it better to have more or less propeller blades?

The number of propeller blades should match your boat’s needs and design. More blades can provide better grip and stability, but it can also increase drag.

Are larger propellers more efficient?

Larger propellers can be more efficient for some applications, especially at lower speeds and for heavy boats. However, they may not be suitable for all vessels.

How deep should my prop be in the water?

Your propeller should be submerged according to the manufacturer’s recommendations, typically with the anti-ventilation plate about 1-2 inches below the hull when the boat is on plane.

How much faster will a stainless prop go?

A stainless steel propeller can provide a slight increase in speed compared to an aluminum prop due to its improved efficiency.

What are the pros and cons of aluminum propellers?

Pros of aluminum props include affordability and lightweight. Cons include reduced durability compared to stainless steel and potentially lower performance.

Why does my outboard bog down when I accelerate?

Your outboard may bog down during acceleration due to factors like incorrect propeller pitch, engine issues, or fuel delivery problems. Consult a marine mechanic for diagnosis.

How much speed do you lose with a 4 blade prop?

The speed loss with a 4-blade propeller compared to a 3-blade propeller can vary but is generally minimal, often outweighed by improved stability and grip.

Is a stainless steel prop worth the money?

A stainless steel propeller is worth the investment if you prioritize durability and performance. It can provide long-term value and performance benefits.

Should you go up or down in pitch when switching to a stainless prop?

When switching to a stainless steel propeller, you might need to adjust the pitch depending on your boat and desired performance. Consult manufacturer recommendations or an expert for guidance.

Will a higher pitch prop make my boat faster?

A higher pitch propeller can increase top speed, but it may reduce low-end power and acceleration. The right choice depends on your boat and goals.

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